Here is how I did rear adjustable rear;
Looking though different Volvo builds, I have seen how some people do it, try to get a standard 2.5" coilovers spring to work with the 5" upper spring perch. But this never seems to look right.
After doing some digging on different circle track sites I found an adapter plate that goes from the 2.5" spring perch to a 5" spring, I also found the rear VW mk4 spring perches bolts on like a Volvo. I was able to get 5" coilover springs from summit
First I removed the stock spring
Next I bolted on the VW adjustable spring perch
Next the spring adapter
Then I put in the spring, with the shock removed, there is plenty of room to toss the spring in with out compressing it.
Then I cut the bump stops

To prevent the suspension of going full droup and the shorter spring fall, and to not blow out stock shocks I had to run shorter shocks.
Most seem to go for a s10 front shock for the rears, but when I looked at the difference, between the stock and that recommended shock, the difference wasn't enough. I found that shocks from a c10 rwd fronts are shorter

Two things need to be changed on this shock, the upper mount eyelet is slight to big, KYB offers adapter sleeves for cheap
The thinnest one goes on the upper mount bolt

The lower sleeve is too short, so I swapped the lower bushing and sleeve
Those now can be installed.
Next I installed my DYI adjustable panhard bar and adjusted it to center the rear axle
Nothing but bad pics on that.

Here is a picture of the suspension with loaded
unloaded
The shocks don't let the axle go down enough to to let the the spring fall out, but I still have a good amount of suspension travel and feels nice and comfortable.
I still need to build adjustable torque rods and bring the wheels forward.
Here's before and after with both coilovers

Great thread! I really like the mostly bolt on solutions going on here.

Quote:

Originally Posted by firefight

I still need to build adjustable torque rods and bring the wheels forward.

This is the wrong reason to install adjustable torque rods. In fact, if you actually use them for intended purpose (resetting pinion angle to factory specs) it would most likely move the rear wheels back even further.

Cutting and shortening the lower trailing arms is still the best way to deal with the rear wheels being out of center with the wells once lowered. BTDT

the shocks specs I could find where only length compressed and extended. I physically compared those to new 240 ones, they felt slightly stiffer, but where not totally un-compressible by hand.
I imagine that if you wanted it stiffer you could got to the Gas-A-Just which are stiffer, or bilstines.
I wanted it to be low and comfortable, and didn't want to just cut my springs,

The picture I posted of car in the last picture shows the adjusters about 3/4" down, with a total adjustment of about 3" downward.

Wheels are 16x8 BMW bbs style 5s, with 25mm adapters. Tire size I don't know off hand, ill find out when I get home

Great thread! I really like the mostly bolt on solutions going on here.

This is the wrong reason to install adjustable torque rods. In fact, if you actually use them for intended purpose (resetting pinion angle to factory specs) it would most likely move the rear wheels back even further.

Cutting and shortening the lower trailing arms is still the best way to deal with the rear wheels being out of center with the wells once lowered. BTDT

Thanks that was the goal, to make it bolt on nicely and give the impression that it was meant to be that way.

Thanks for that info, Ill start doing some reading on shorting the trailing arms!

the shocks specs I could find where only length compressed and extended. I physically compared those to new 240 ones, they felt slightly stiffer, but where not totally un-compressible by hand.
I imagine that if you wanted it stiffer you could got to the Gas-A-Just which are stiffer, or bilstines.
I wanted it to be low and comfortable, and didn't want to just cut my springs,

The picture I posted of car in the last picture shows the adjusters about 3/4" down, with a total adjustment of about 3" downward.

Wheels are 16x8 BMW bbs style 5s, with 25mm adapters. Tire size I don't know off hand, ill find out when I get home